ML20084R208
| ML20084R208 | |
| Person / Time | |
|---|---|
| Site: | 05000241 |
| Issue date: | 05/16/1984 |
| From: | Hibbard M MISSISSIPPI STATE UNIV., MISSISSIPPI STATE, MS |
| To: | Thomas C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8405220228 | |
| Download: ML20084R208 (4) | |
Text
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MISSISSIPPI STATE UNIVERSIT(
RADIOLOGICAL SAFETY OFFICE 108 CARPENTER May 16, 1984 DRAWER NE MISSISSIPPI SI ATE, MS. 39762 (601) 325-3412 Mr. Cecil Thomas, Chief Standardization and Special Projects Branch Division of Licensing U. S. Nuclear Regulatory Commission Washington, DC 20555 Docket No. 50-241
Dear Mr. Thomas:
A close out safety inspection of the Mississippi State University Edwards Reactor Facility was conducted en June 21 and 22,1982 by Mr.
Ross Albright of the NRC Region II (Atlanta) office. As a result of a radiation area survey performed during this inspection, some equipment items were discovered to have possible contamination /activaticn levels above background. A subsequent analysis of the affected items using a 3" x 3" NaI scintillation detector connected to a 1024 channel multi-channel analyzer indicated the presence of small amounts of Co-60 in the in-core ion chambers and control rods, and Cs-137 in the off-gas holding tank. A summary of NRC survey meter readings as well as our estimate of activity of these items is shown below.
RESULTS Component Smear Direct Radiation Activity and (alpha and beta)
(micro-R/hr)
Isotope 4 Detectors less than 1000 50 (on contact) 49 pCi co-60 DPM/100cm2 on outside of bagging 2 Control less than 1000 20 (on contact) 1.55 pCi Co-60 Rods CPM /100cm2 on outside of bagging Off-Gas Holding 5 (on contact) 229 pCi Cs-137 Tank These equipment items (listed above) will be added to the University's broad radioactive materials license (License # MS-EBL-02) and stored with other radioactive materials held by the Mechanical and Nuclear Engineering Department. Attachment 1 outlines the possession limits of our radio-active materials license.
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8405220228 840516
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PDR ADOCK 05000241 G
5 Mr. C cil Thomas, Chief
-May 16, 1984 Page 2 In addition to the equipment items listed above, two (2) stacks of graphite were surveyed by Mr. Albright with an indicated reading of
~20 pR/hr on contact. Subsequent analyses of the graphite indicated less than 50 dpm/100 cm2 of removable surface contamination. The spe-cific activity of neutron activation products (primarily Europium) in the graphite is estimated to be less than 2.0 x 10-5 pCi/ gram of graphite.
During the recent broad license compliance inspection by the Mississippi State Department of Health, Mr. Michael J. Smith (MSDH inspector) sur-veyed the graphite at my request with a MSDH micro-R survey meter.
Survey results are tabulated below.
South block North block
~17 pR/hr (on contact)
~21 pR/hr (on contact)
~4-4h UR/hr (@ 1 meter)
~5h-6 pR/hr (@ 1 meter)
The building area background was estimated to b'e approximatley 3.5 -
4.0 pR/hr.
Based on the results of the above analyses and surveys, it is my opinion that the graphite currently stored in the Edwards Reactor Facility presents no significant health hazard and should be released for unrestricted use.
With the resolution of these items, please accept this letter as a request to vacate both the construction permit and the docket number.
Sincerely yours.
M Michael J. Hibbard, P.E.
Radiolog1 cal Safety Officer MJH:er xc C..T. Carley Eddie Fuente (MSDH)
J. 1. Paulk (Chairman, NEC) i
MISSISSIPPI STATE UNIVERSIT(
RADIOLOGICAL SAFETY OFFICE 108 CARPENTER DRAWER NE MISSISSIPPI STATE, MS. 39762 ATTACINENT 1 (601) 325-3412 Radioactive Material Possession Limits Please note for your records, Mississippi State University is licensed by the Mississippi State Department of Health to possess radioactive materials. The University's license number is MS-EBL-02, expiration date September 1, 1984.
The University is authorized to possess up to 10 curies of each radioactive material between Atomic numbers 3 and 83 inclusive in any physical and/or chemical form. A list of additions and ex-ceptions to this possession limit is attached.
If you should have additional questions regarding MSU's radio-active materials license, please feel free to contact me.
Sincerely yours, 9w Michael J. liibbard, P.E.
Radiological Safety Officer MJil:cr Enclosure
m FORM (IH,2 (cent.)
MISSISSIPPI STATE DEPARTMENT OF HEALTH RADIOACTIVE MATERIAL LICENSE Supplementary Sheet 2. og._ _6 pages License Number MS-EBL-02 page Amendment No. 19
- 6. Radioactive Material
- 7. Chemical and/or Physical
- 8. Maximum Radioactivity and/or (Element and Mass Number)
Form quantity of material which licensee may possess at any one time.
B. liydrogen-3 B. Any B. No single source to exceed 5 curies, total possession 100 curies C. Americium-241 C. Any C.
1 curie D. Curium-244 D. Any D. 10 microcuries E. Flutonium-239 E. Plutonium-Beryllium E. 80 grams Neutron Sources F. Hadium-226 F. Any F.
100 milligrams G. Uranium-235 G. Any G.
14 grams
!!. Californium-252 H. Neutron Source II. 3 micrograms I. Uranium-238 I. Cylindrical Slugs I. 2500 kilograms TOTAL POSSESSION LIMIT FOR ALL RADIOACTIVE ilATERIAL SHALL NOT EXCEED 200 CURIES.
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